Question

Complete the Punnett square for the following cross-pollination and give the genotypic and phenotypic ratios: for white (WW) and black (ww) Female: x Male:Ww Male: ww
let the () count as spaces
() () ()
() () ()
() () ()

Answer 1

Answer:

Phenotypic ratio= 1:1

Genotypic ratio = 1:1

Explanation:

This is a monohybrid cross involving a single gene that specifies a color phenotype.

According to the question, WW, which is homozygous dominant i.e same allele is white while ww, which is homozygous recessive is black.

Hence a genotype Ww will possess a white phenotype since the W allele will mask the expression of w.

In a cross between a female and male with a a Genotype Ww and ww respectively. The parents alleles will be separated into gametes according to Mendel's law of segregation. (See attached image).

Ww will produce gametes W and w

ww will produce gametes w and w

The four possible offsprings will have Ww (2) and ww (2) genotypes. Hence two of them will be white while two will be black.

Hence, the phenotypic ratio will be 1:1 while the genotypic ratio will also be 1 Ww: 1 ww

Answer 2

Punnett Squares are used to demonstrate the genotypic and phenotypic ratio of a certain trait in an organism. The cross between the traits can be monohybrid, dihybrid, or trihybrid.

In the given cross, the WW stands for white, whereas ww stands for black.

The cross between the heterozygous white female (Ww) with the black male (ww) is given in the attachment below.

• The genotypic ratio between black and white is 1:1.
• The phenotypic ratio between black and white is 1:1.

Thus, the ratio is 1:1.

To know more about Punnett square, refer to the following link;

https://brainly.com/question/25357981